During his imprisonment, Sinwar led the Supreme Leadership Committee of Hamas prisoners in Israeli jails, helping to manage confrontations with prison authorities during a series of hunger strikes.
The attack, which took place during the Jewish holiday of Simchat Torah, marked the deadliest day for the Jewish community since the Holocaust, resulting in the deaths of 1,200 Israelis and the abduction of over 100 hostages by Hamas, a Palestinian militant group.
Urges all concerned actors to exercise maximum restraint, recommit to full implementation of Security Council resolution 1701 (2006), return to cessation of hostilities to restore stability